Culvert.



No. 828,917. PATENTED AUG. 21, 1966. T. BARDON (*5 G. E. WIBERG.

GULVBRT.

APPLICATION PILEI mac. 6, 1905.

W MW In ventors:

Attest:

o'awz WW? g m Atty To call wit/mt It TJMLZ/ concern:

"urn-run i @FIEKQE.

A 'HLAN D, lVISCONSIN.

CUMVERT.

Specification of Letters Patent.

Patented Aug. 21, 1906.

.lpplication filed December 6, 1905. Serial llo- 290,52t.

Be it known that we, 1 ironies ii'iARDUN and. (uAnLus E. Wrnnno, citizens of the United s, residing in Ashlarutl, in the county Asblsnd and State of JJisconsin, have invented certain new and useful Improvements in Culverts of which the followin is a specification, reference being had to the accompanying drawings.

Our invention relates to improvements in culverts made up of three or more parts or sides assembled together; and the object of our invention is to provide a culvert of this class which. will the sides thereto adjacent. These lugs 'prov ject from the edges of the sides and under pressure from the outside they frequently break ch", in which case the culvert collapses, since there is no support for the side after the lugs have broken oil, and one lugs breaking results in the stress being thrown entirely upon the remaining lugs, with the result that they break OH in. succession. To prevent this collapse of the culvert and to give support in case the lugs break, as described, We provide the"sides with a thickened edge, against which the side or edge of the adja cent plate abuts and upon which it rests and is supported in case the lugs give way. In case of the bottom plate the two longitudinal sides may be thickened.

In case the culvert referred to above as.be

, ing in common use now is subjected to great pressure from. within, the lugs tend to slip out of the retaining-notches, thereby wrecking the culvert as a whole. To prevent this untoward result, we provide the lugs or flanges with inwardly-pro ecting ears or teeth-which pass upon the outside of the adjacent plate or side. In this way we supply means for re sisting pressure from within the culvert as, for instance, the pressure due to the formation of ice in the culvert.

The culvert above referred to as being in common use is connected with the small pipes of users or abutters by means of brick so readily assembled, strong u to resist pressure, non-collaps1ble, and prol arches or chambers. To prm for directly attaching the smai. pipes of such users, we form some of the plates or sides of our culvert with an opening about which is an outwardly-pr'ojecting collar. The small pipes ofthe users slip over this collar in much the same way as a piece ofstovepipe slips over the ring formed upon the ordinary range for its reception. i

The culvert above referred to as being in common use is made up of plates which form a side by having their ends abut one against the other. In case the earth settles unevenly it frequently happens that the sections pull apart from each other, resulting in the dismantling of the culvert. To prevent this, the sides areprovided with a flange at the end which overlaps the abutting end of the next plate or section, which is adapted to fit inside the flange.

In the drawings illustrating the principle of our invention and the best mode now known to us of applying that principle, Figure 1 is a perspectiveview of our new culvert. Fig. 2 i's'a sectional view upon the line A A of Fig. i, and Fig. 3 is a transverse sectional view showing a modification.

The bottom plate a. becomes gradually thicker from its longitudinal mid-line toward its longitudinal edges b t, and from these edges 7) project a series of lugs c of a less thickness than the edge I), whereby a shoulder is left, as at d, Fig. 3. Upon each of the lugs c is formed an inwardly-projecting tooth e,

lugs c of which interlock between the lugs c of the sides a and g and are formed with teeth c, as in the case ofthe bottom platea. .The plate f thickens from its lower edge to its upper edge, as is clearly shown in Fig. 1, and it is formed with openings, it, around which there is a raised collar 41 to form a neck, within which slips the pipe which connects the culvert with houses which it serves as a main sewer. The side 9' increases in thickness from its lower to its upper longitudinal edge and is formed with toothed lugs c, which interlock with the lugs upon the plates a and f.

The several plates (1., f, and g are formed with fian'es j, which overlap the abutting ends of t ei'corresponding plate oi'the succeeding section of the culvert, as clearly, shown in Fig. 2. These flanges j not only provide for an accurate fittin of the sections one Withinthe other, but a'so prevent thewithin which fits the edge of the side f, the

IIO

plates from faliing apart .incase the earth settles unevenly, which frequently occurs." The ribs 1c serve to strengthen the plates.

In Fig. 3 a modification is shown diiiering from the preferred form shown in Fig. 1 in only one respectto wit, the lates a,;f, and

g are eachthickened towar one edge. It will be apparent toall skilled in this art that in any case the side plates can be thickened only along one longitudinal edge, while the bottom plate may be thickened along both longitudinal edges, as shown in Fig. 1.

We are aware of the patents granted F. S. and F. H. Beach, March 10, 1903, No. 722,396, and A. Lauridtzen, December 8 1903, No. 746,112, and disclaimall that is therein shown.

What We claim isr 1. A culvert made up of a plurality of interlocking lates each of which is formed with lu s w ich project outwardly from the longitudinal edges of the plate, the lugs of one plate entering between the lugs of the itself, the thickness of said edges in each two adjacent plates in interlocking engagement therewith; one of said longitudinal late being continuous and tltdckenedand ormed inte ral with the plate thickened lon itudinaled e being greater than that of t e lugs whic project outwardly therefrom, whereby a su porting-shoulder is formed on the inner wall e'ned' longitudinal edge.

2. A culvert made up of a pluralityof in of each plate along said thick- I terlocking plates formed with lugs which prodlge being of less thickness ereby a supporting-shoul- 3. A built-up culvert made up of a plural ity of interlocking plates having thickenedlongitudinal edges from which project lugs of less thickness than said edge, whereby a supporting-shoulder is formed along said edges;

said In s being formed with teethin the groove edge of the adjacent plate is seated; said plates bein' provided with flan es atone end etween which and said shoulder the which over ap the abutting en of the corresponding plate of the next succeedin section of the culvert; and a side plate of said culvert being formed with an opening having a raised collar ther'earound for the connection of a house-pipe.

THOMAS ,BARDQQM CHARLES E. WIBERG.

Witnesses; i

BEN. S.SMI'1H, N ELLIE HOPBENYAN. 

